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Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Creator:: Regan, Richard P. and Fisher, Glenn C.
Resource Type:: Conference Proceeding
Full Text:: OR 97331 COOLEY SPRUCE GALL ADELGID CONTROL IN DOUGLAS-FIR CHRISTMAS TREE PLANTATIONS, OREGON, 1986

Damage from laminated root rot at the Black Rock Forest management research area in western Oregon

Creator:: Lawson, Thomas T., Berg, Alan B., Hansen, Everett M., and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: , Oregon State University, Corvallis. TABLE 1. NUMBER AND VOLUME OF DOUGLAS-FIR KILLED BY P. WEIRII AND

Host suitability studies of Douglas-fir and white alder to the gypsy moth

Creator:: Joseph, Gladwin
Abstract:: Douglas-fir, Pseudotsuga menziesii and white alder, Alnus rhombifolia, species that are prevalent in the Pacific Northwest, were fed to larvae of the gypsy moth, Lymantria dispar L. Gypsy moth larvae from different familial lines (egg masses) from a single geographic population were evaluated on these hosts. The larvae were fed...
Resource Type:: Masters Thesis
Full Text:: -FIR AND WHITE ALDER TO THE GYPSY MOTH by Gladwin Joseph A THESIS submitted to Oregon State

Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Creator:: Dombrosky, Scott A.
Abstract:: The impact of various factors on seed production in a Douglas-fir (Pseudotsuga menziesii) seed orchard in western Oregon was examined by monitoring the fate of seeds in thirty cones, stratified into three crown levels, on each of ten trees during the 1984 growing season. Cones were examined monthly between April...
Resource Type:: Masters Thesis
Full Text:: -fir Seed Orchard in Oregon. Abstract approved:_ Redacted for Privacy /TiGothy D. Schowalter The

Insects associated with black stain root disease of Douglas-fir in western Oregon

Creator:: Witcosky, Jeffrey John
Abstract:: The root systems of Douglas-fir trees infected with Verticicladiella wagenerii and assigned by crown color and terminal growth characteristics to several stages of decline were excavated at three widely separated sites in the Coast Range of Oregon. Data were gathered on insect species present, extent of colonization of the root...
Resource Type:: Masters Thesis
Full Text:: Stain Root Disease of Douglas-fir in Western Oregon. Abstract approved: Redacted for Privacy ee C

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Creator:: Angwin, Peter A.
Abstract:: Studies to identify the environmental factors that influence the rate of ectotrophic mycelial growth of Phellinus weirii (Murr.) Gilbertson along Douglas-fir roots were undertaken both in the laboratory and in the field. The effects of soil pH, nitrogen, moisture, temperature, microorganisms and bulk density were investigated. In the lab, the...
Resource Type:: Masters Thesis
Full Text:: damaging in pure Douglas-fir stands west of the crest of the Cascade range in Oregon and Washington and

Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

Creator:: Hessburg, Paul F.
Abstract:: Verticicladiella wageneri Kendr. is a vascular wilt pathogen of Douglas-fir in the Pacific Northwest, The disease is characterized by black staining of colonized sapwood; crown symptoms are those typical of a wilting syndrome. Histopathological studies revealed that the pathogen is limited to the xylem but causes vascular dysfunction in both...
Resource Type:: Dissertation
Full Text:: disease increase, in natural V. wageneri infection centers in Douglas- fir plantations in Oregon and

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

Creator:: Witcosky, Jeffrey John
Abstract:: Verticicladiella wageneri Kendrick is a vascular wilt pathogen of conifers, causing a black staining of colonized sapwood of roots and lower stem. In Douglas-fir, V. wageneri is intimately associated with insects. Hylastes nigrinus, Pissodes fasciatus, and Steremnuis carinatus are commonly associated with diseased hosts, carry inoculum of V. wageneri in...
Resource Type:: Dissertation

Douglas-fir tussock moth adult male survey north Idaho and western Montana, 1982

Creator:: Dewey, Jerald E., Livingston, R. Ladd, Kohler, Steve, and United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management
Abstract:: Douglas-fir tussock moth populations are monitored annually in northern Idaho and western Montana to insure early detection of changes from endemic to outbreak population levels. Adult moth trapping in 1982 was intensified and expanded into additional areas from 1981 because of concern that with each passing year the probability of...
Resource Type:: Technical Report
Full Text:: ./ , and S. Kohler 2/ INTRODUCTION • Douglas-fir tussock moth 4/ populations are monitored annually

Decay caused by infection of Fomes cajanderi Karst : in top-broken, young-growth Douglas-fir trees

Creator:: Cahill, James M.
Abstract:: A glaze storm of exceptional severity was seen in the Corvallis area, January, 1942. The weight of ice that accumulated in the crowns of young-growth Douglas-fir trees caused widespread top breakage in many stands lying in the broad path of this storm. Early research on this phenomenon showed the majority...
Resource Type:: Masters Thesis
Full Text:: Douglas-Fir Trees by James Michael Cahill A THESIS Submitted to Oregon State University in partial

ScholarsArchive@OSU

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Damage from laminated root rot at the Black Rock Forest management research area in western Oregon

Host suitability studies of Douglas-fir and white alder to the gypsy moth

Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Insects associated with black stain root disease of Douglas-fir in western Oregon

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

Douglas-fir tussock moth adult male survey north Idaho and western Montana, 1982

Decay caused by infection of Fomes cajanderi Karst : in top-broken, young-growth Douglas-fir trees

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